Outlook add-ins (or mail apps) are mail applications that can be integrated into Outlook clients or Web. Usually, add-ins are developed and provided by 3rd party companies. Please note, that we can't provide full support to the 3rd party add-ins installed.

The client must be one of the supported hosts for Outlook add-ins. The following clients support add-ins:

  • Outlook 2013 or later on Windows
  • Outlook 2016 or later on Mac
  • Outlook on iOS/Android. Note: Add-ins on Outlook for mobile devices can only work if the mailbox hosted under Microsoft 365 solution.
  • Outlook on the web for Exchange 2016 or later and Microsoft 365
  • Outlook on the web for Exchange 2013

How to install new Add-ins

  1. Add-ins can be added from either OWA or Outlook 2013 or later. When opening Add-in menu from Outlook, it will open a browser window and ask you to log in to OWA. 
  2. To access the Add-in menu from OWA, click on the Gear Icon > Manage Add-ins (or Manage apps, depending on Exchange version).
  3. Click + sign and choose desired installation option, for example, Microsoft Office Store:
  4. Select necessary Add-in:
  5. You will see a pop-up that has further information about the Add-in. Confirm that you want to install it:

Note: some add-ins may be not compatible with your Outlook version. Also, some add-ins may affect Outlook performance, please check Which Plugins May Affect Outlook Behavior? for more information.